Why is the yellow bird vomiting?

The yellow bird is usually sick.Most of these birds are raised in cages. Prepare a suitable cage, put it in it, and put it in the food cans and water tanks inside.You must always ensure that there are always water in the water tank, but you need to change it regularly to keep the water quality.The feed that is not eaten every day should be dumped, so as not to cause birds to get sick after deterioration.Clean the bottom of the cage once every two weeks. Of course, you can also clean up.